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If you find these tutorials useful and would like to link to them from your own pages,please contact GIS Support Specialist, Krista White the Drew Spatial Data Center Director, Dr. Catherine Riihimaki via email. You are invited to leave comments or ask questions in any of the Comment areas of each tutorial page. |
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This tutorial was expanded and adapted from Kerski, J.J.. (2009). Exploring Data Using Cartograms within ArcGIS Desktop. Redlands, CA: ESRI. Retrieved October 5, 2009, from ESRI GIS Education Community: http://blogs.esri.com/Info/blogs/gisedcom/archive/2009/10/16/exploring-data-using-cartograms-within-arcgis-desktop.aspx.
Copy Data Files to the Desktop
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What is a Cartogram?
Cartograms are a method of displaying geospatial data as totals, wherein data are displayed with both color and area as a function of their values. Cartograms are analogous to pie charts in which the slices of the pie are geographic regions rather than wedges. The Cartograms tool is a script created for ArcGIS that provides a set of spatial analysis tools not included in the standard ArcGIS software. You can create maps that will provoke reactions and dialog by displaying data as Cartograms. This tutorial will allow users to make Cartograms using their own data.
Download Cartograms Tutorial Files
Download the zipped tutorial files at: CartogramsTutorial.zip Be aware that the zipped package is approximately 5MB, so please allow sufficient time and memory space on your computer for download.
- A dialog box will appear titled, "Opening CartogramsTutorial.zip." Save the file to your computer's Desktop.
- Navigate to the desktop of your computer
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- and unzip the file. To do this, right click on the CartogramsTutorial.zip folder. (click image to enlarge)
- Choose Extract All. The Windows Extraction Wizard will appear.
- Click Next. Make sure that the field under "Files will be extracted to this directory" points to your computer's desktop. (click image to enlarge)
- If it does not point to your computer's Desktop, click the Browse button. The select a destination dialog box will appear.
- Choose the Desktop option that appears at the very top of the window in the dialog box. You may need to use the scroll bar on the right hand side of the window to see the Desktop Option. (click image to enlarge)
- Click OK.
- Once this field points to your computer's Desktop, click Next. Windows will unzip the file and tell you that the extraction is complete.
- Click the Finish button
- Go to the Start menu
- Click My Computer
- Double click on the O: Drive
- Folders are listed alphabetically by department. Double click on the envstudies folder.
O drive folders - Double click on the GIS Tutorial folder. Inside you will see the Cartograms folder.
- Right click on the CartogramsTutorial folder, and choose the Copy option.
- Close the GIS Tutorial window.
- Right click anywhere in the blank, blue space on the Desktop of your computer. Choose the Paste option. You should now see the CartogramsTutorial folder on your Desktop.
Install the Cartograms Tool
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ArcMap sets file paths to find the data for each of your map layers. Because you moved the data files from the O:\envstudies drive this site to your Desktop, the file paths that ArcMap stored are no longer accurate. You can easily repair the file paths. This is something you will need to do each time you want to use a Map Project you’ve copied or moved from one location to another.
Repair Data Source
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